mwave offers the A-Data 16GB MicroSDHC Class 2 Secure Digital High-Capacity Card, model no. AUSDH16GCL2, for $21.99. This $6 mail-in rebate cuts it to $15.99. With free shipping, that's $1/GB and the lowest total price we could find by $20. Rebate ends today.

Note that there is no microSDHC to SD adapter included.